Abstract
In situ intermetallic matrix composites were fabricated by MA (mechanical alloying)-PDS (pulse discharge sintering) process. Matrix was Fe-28at.%Al and in situ reinforcements were TiC and TiB2. Mechanical alloying was carried out using a vibratory mill. For the Fe-AI-Ti-C alloy system, milling time was systematically changed from 1 to 400 hours to observe the effect of milling parameter. For the Fe-Al-Ti-B system, volume fraction of reinforcements was systematically changed from 0 to 25 at.%. Mechanically alloyed powders were sintered in the plasma discharge sintering system. Fe3Al matrix and in situ reinforcements, that is, TiC and TiB2 particles were successfully synthesized during MA-PDS process.
